High-strength steel cord wire

Wire diameter R is not more than 8.0mm or 3.5 mm, component composition, by mass%, C: 0.70% 1.20% or less, Si: 0.15% to 0.60% or less, Mn : 0.10% to 1.00% or less, N: 0.0010% to 0.0050% or less, Al: 0% than 0.0100% or less, balance being Fe and impurities, and the surface portion and the central portion has a thickness of the surface layer portion is at 0.20 × R less than 50 [mu] m, center, a pearlite structure in area% and contained in a proportion of 95% to 100%, of the surface layer portion C content is 95% or less 40% of the C content in the central portion, the ratio to the thickness of the lamellar cementite at the center of the thickness of lamellar cementite in the center of the surface layer portion thickness be less 95% , after finishing drawing process also, high strength, workability It has a steel cord wire material capable of preventing cracks caused by delamination.